Drilldown: Medicines

Dexmethylphenidate (1) · Riboflavin (vitamin B2) (1) · Sildenafil (1)

Focalin, Focalin XR (1) · Many generics/OTC (1) · Viagra, Revatio (1)

CNS stimulant (1) · NDRI (1) · PDE5 Inhibitor (1) · Psychostimulant (1) · [[:Category:B-vitamins|B-vitamin]] (1) · [[:Category:Vitamins|Vitamin]] (1)

Norepinephrine–dopamine reuptake inhibition (DAT, NET), d-threo enantiomer of methylphenidate (1) · Selective inhibitor of phosphodiesterase type 5 (PDE5), preventing cGMP breakdown in vascular smooth muscle. In the corpus cavernosum, potentiates the NO/cGMP cascade triggered by sexual stimulation. (1) · '"`UNIQ--vote-0000124C-QINU`"' The 400 mg/d dose for migraine prophylaxis is supported by randomized trials (Schoenen 1998) and remains a low-risk evidence-based supplement option. Characteristic bright-yellow urine fluorescence with high-dose oral supplementation. (1)

'"`UNIQ--vote-00000150-QINU`"', '"`UNIQ--vote-00000151-QINU`"' (1) · '"`UNIQ--vote-00000705-QINU`"', '"`UNIQ--vote-00000706-QINU`"' (1) · '"`UNIQ--vote-0000124D-QINU`"', '"`UNIQ--vote-0000124E-QINU`"', '"`UNIQ--vote-0000124F-QINU`"' (1)

None (1) · 50 mg ~1 h before sexual activity (ED); 20 mg TID (PAH) (1) · Migraine prophylaxis: 400 mg PO daily; deficiency replacement 5-30 mg/d (1)

None (1) · 25, 50, 100 mg tabs (Viagra); 20 mg tabs and 10 mg/mL oral suspension (Revatio) (1) · 25, 50, 100, 250, 400 mg tablets; OTC (1)

None (1) · 100 mg/d (ED); 20 mg TID (PAH) (1) · No strict ceiling for water-soluble vitamin; UL not set (1)

IV (rare) (1) · IV (Revatio) (1) · Oral (3)

None · Hours · 30-60 minutes · 1-2 hours · ~30 min · LDL lowering at 2 weeks, max by 4 weeks · ~1 hour · 15-30 minutes · 15–30 min · 1–2 h · 30–60 min · Antidepressant effect emerges over 1-2 weeks · BP and symptomatic LUTS improvement within 1-2 weeks · BP effect within 1-2 weeks · Clinical improvement within 24-72 hours · Days · Motor improvement over days at therapeutic dose · Over weeks · Postprandial glucose effect within days; HbA1c by 12 weeks · Sleep effect from first dose; antidepressant effect over 1-4 weeks

Other values:

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IR 4–6 h; XR 8–12 h (1) · N/A (1) · ~4 h (1)

2.2 h (IR parent); ~3 h (XR parent) (1) · ~1-2 hours plasma (riboflavin itself); FAD/FMN tissue cofactors are continuous (1) · ~4 h (1)

~22–25% (1) · ~40% (1) · ~50-60% (oral; food enhances) (1)

Category B (1) · Category C (1) · Safe at replacement and supplement doses.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1)

OTC in US (1) · Rx-only in US (1) · Schedule II (1)